Carvalho thinks the manager will stay on but it could be a different story for Liedson.

BBC: Brazilian ace poses Ibrox threat

Liedson, who came on at half time, did little until his rose to head home a corner.

CNN: Liedson salvages point for struggling Portugal

But Distin was sent off for upending Liedson inside the box and Veloso calmly slotted home an away goal.

BBC: Everton 2-1 Sporting Lisbon

"With Liedson, Sporting will be confident about scoring in Glasgow but they know Rangers will not be easy, " added Carvalho.

BBC: Brazilian ace poses Ibrox threat

In Group D, Sporting Lisbon came from behind to beat Dutch strugglers Heerenveen 3-2 as Liedson netted a hat-trick.

CNN: Hamburg humbled in Europa League by Rapid

The 22-year-old Montenegrin international Simon Vukcevic, described as "quick and dangerous" by Carvalho, is likely to support Liedson from an advanced midfield role.

BBC: Brazilian ace poses Ibrox threat

Liedson, who plays for Sporting Lisbon and recently became a Portuguese citizen, scored with a header three minutes from time to give his new country a 1-1 draw.

CNN: Liedson salvages point for struggling Portugal

Saha had another effort saved before the moment which transformed the mood inside Goodison Park when substitute Jack Rodwell's overhit pass was miscontrolled by Distin, allowing Liedson to break clear.

BBC: Everton 2-1 Sporting Lisbon

Portugal, who only managed 17 goals in their 10 qualifying games, failed to test Barry again after Ronaldo's early shot until the Elephants keeper stopped a weak header from the largely anonymous Liedson after 57 minutes.

BBC: Ivory Coast 0-0 Portugal

Ivory Coast were courageous in defence - Didier Zokora, for example, receiving a kick in his arm after bravely heading a cross that Liedson tried to volley - and showed an organisation and discipline in their play that suggested talk of fractures in their squad are wide of the mark.

BBC: Ivory Coast 0-0 Portugal